Describe how this instrument works.

Operation:

Answer:

Plum Pudding Model.

Explanation:

I just know.

Answer:

I just did the assignment it's "decreases"

Explanation:

If you guys came from Ed-genuity (i'm writing it like that because apperantly that is a swear word?) That means the next questions are "As you move from left to right across the periodic table, electronegativity..." and "As you move from top to bottom within a group, the first ionization energy...".

for electronegativity, it's increases and for ionization energy it's decreases. Hope this helps!

Answer:

1. Decreases

2. Increases

3. Decreases

Answer:

Because the same amount of sugar is still there. The solid sugar crystals break apart in water as the sugar dissolves, but the individual sugar particles or molecules are still present and do not change as a result of dissolving in the water. The combined mass of the sugar and water shouldn't change.

Answer:

1.  An apple is something that has matter.

2. Light does not have matter. It neither has mass or takes up and space.

3. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

4. A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. Absolute confirmation of a chemical change can only be validated by chemical analysis of the products!

5. A precipitate is a solid that forms out of solution.

6. In simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. On the other hand, an exothermic reaction releases energy into the surrounding of the system.

Explanation:

Matter is anything that has mass and takes up volume.

Answer:

1. some thing that has matter is an apple, a person,a table. things that does 2.not Light.,Sound.,Heat.Energy.Gravity.Time.A Rainbow.Love.

3. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

4.A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. Absolute confirmation of a chemical change can only be validated by chemical analysis of the products!

5.Precipitate: In chemistry, a solid formed by a change in a solution, often due to a chemical reaction or change in temperature that decreases solubility of a solid. In meteorology a precipitate is liquid or solid water (rain, snow, etc.) falling from the sky.

6.n simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. On the other hand, an exothermic reaction releases energy into the surrounding of the system.

hope this help plz give me a thxs and brainlyest and a five star thx and you welcome let me know if this helped

Answer:

If my memory serves me correctly, the answer would be OPTION 3

Explanation:

May I have brainliest please? :)

Answer:

I’m very confused can you clerify that?

Explanation:

Answer:my bit,cu,mghg

Explanation:

Answer:

na

Explanation:

because it has more atomic radius in it

Answer: Colombia

Explanation:

Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]

From the question

error = 500 - 499.7 = 0.3

actual volume = 500 mL

We have

[tex]p(\%) = \frac{0.3}{500} \times 100 \\ = \frac{3}{50} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

because tiles conduct energy faster than carpet

Explanation:

when it is winter tiles are as coled as ice an carpet is barley coled when left a tile out in the sun I would burn like a stove but if you left a carpeted it would be warm

Answer:

violet

Explanation:

Waves with a short wavelength have the most energy. Red waves have a relatively long wavelength (in the 700 nm range), and violet waves are much shorter - roughly half that. Because violet waves have the shortest wavelength of the visible light spectrum, they carry the most energy (google)

Answer:

The correct answer is C. element

Explanation:

The sample cannot be an element because an element - or elemental substance - cannot be decomposed into simpler substances. Thus, it cannot be composed by differents types of atoms. For example, an element is carbon (C).

As the sample contains three types of atoms, it can be a compound, a molecule or a mixture, because they can be composed by different types of atoms - of different chemical elements. For example, the sample could contain the element carbon (C) combined with other elements, for example oxygen (O) or hydrogen (H), amoing others.

The sample can not be an element due to having only one type of atom.

The sample can be mixture, compound and molecule except element because element is formed from only one type of atoms which can not be broken down into simpler one. The sample contains three types of atoms which means it may be mixture, compound or molecule.

The reason behind this is that mixture, compound and molecule can be made up of three atoms whereas the element can't so we can conclude that sample can not be an element.

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Answer:

B. NaBr

D. KOH

Explanation:

Below is the solubility rules given for you knowledge.

Salts of

so using the rules above

NaBr , KOH are soluble, Pb(OH)2 is slightly soluble and AgCl is not soluble.

Answer:hope this helps had to guess these are the correct answers =)

Answer:

223.4J

Explanation:

Given parameters:

Specific heat capacity of substance  = 0.38J/g°C

Mass of substance  = 42g

Initial temperature  = 25°C

Final temperature  = 39°C

Unknown:

Energy required to raise the temperature  = ?

Solution:

The amount of heat required by the substances can be derived using the expression below;

  H  = m c Δt

H is the amount of heat energy

m is the mass

c is the specific heat capacity

Δt is the change in temperature;

 Δt  = 39°C  -  25°C  = 14°C

 Now insert the parameters and solve;

 H = 42 x 0.38 x 14  = 223.4J

Explanation:

Aluminium hydroxide is amphoteric. Because it reacts with both acids and bases. Like any conventional base, the OH radical in Al(OH)3 neutralizes H+ to make water and an aluminium salt. Al(OH)3 solid will also react with excess OH– to dissolve and form the complex ion [Al(OH)4]−.

Answer:

Answer: Aluminium hydroxide ,AI(OH)3,is found in nature as the mineral gribbsite (also know as hydrargillite) and its three much rarer poly morphs

Explanation:

yan lang po ang alam ko

Answer: The density of a material is defined as its mass per unit volume. In this example, each volume of water is different and therefore has a specific and unique mass. The mass of water is expressed in grams (g) or kilograms (kg), and the volume is measured in liters (L), cubic centimeters (cm3), or milliliters (mL).

Explanation: HOPE IT HELPS :)

Answer:

Frequency of photon is 0.513×10¹⁵ s⁻¹

Explanation:

Given data:

Energy of photon = 3.4×10⁻¹⁹ J

Frequency of photon = ?

Planck's constant = 6.63 × 10⁻³⁴ Js

Solution:

Formula:

E = hf

3.4×10⁻¹⁹ J = 6.626 × 10⁻³⁴ Js × f

f =  3.4×10⁻¹⁹ J / 6.626 × 10⁻³⁴ Js

F = 0.513×10¹⁵ s⁻¹

Frequency of photon is 0.513×10¹⁵ s⁻¹.

Answer:

B

Explanation:

Answer:

radiation

Explanation:

because it move from one particle to another and place to place

Answer:

Unicellular organisms contain one cell and all of their functions are based on that one cell whereas multicellular organisms contain more than one cell and their functions are divided amongst different cells like nervous cells, cardiac muscle cells etc.

Explanation:

While multicellular creatures have numerous cells, unicellular organisms only have one.

A single cell makes up a unicellular creature, also referred to as a single-celled organism, as opposed to a multicellular organism, which is made up of numerous cells.

Prokaryotic and eukaryotic organisms are the two broad categories into which all organisms fall.

Unicellular organisms only have one cell, whereas multicellular species have many. While multicellular creatures carry out various cell functions through a clearly defined set of cells, unicellular organisms combine all cellular functions into one cell.

Multicellular and unicellular organisms are comparable in that they exhibit nearly all of the life's processes and functions, including metabolism and reproduction.

They have RNA and DNA, which can show a variety of lifestyles vital to the majority of the ecosystem in which we currently live.

Thus, these are some similarities and differences between unicellular and multicellular organisms.

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Answer:

Density = 1.56 g/mL

Explanation:

We have two sort of concentrations in here, so let's combine them.

% by mass means grams of solute in 100 g of solution

M means, moles of solute in 1L of solution.

We know that our solute is KOH (Molar mass = 56.1 g/mol)

We convert the moles of solute to grams:

56.1 g/mol . 13.9 moles = 779.79 g

Now, we know that 50 g of solute are in 100 g of solution

Then, 779.79 g of solute will be contained in (100 . 779.79)/50 = 1559.58 g of solution

Density = mass / volume

1559.58 g of solution / 1000 mL of solution = 1.56 g/mL

Answer:

hope this helps

Explanation:

see pictures try to put them in order

Molar mass of MgCl₂ : 95 g/mol

An atomic mass unit ( amu or "u") is a relative atomic mass of 1/12 the mass of an atom of carbon-12.  

The molar mass(molecular mass-formula mass) of a compound is the sum of the relative atomic mass (Ar) of the constituent elements of the compound

Can be formulated :  

M AxBy = (x.Ar A + y. Ar B)  

Compound MgCl₂

[tex]\tt M=Ar~Mg+2.Ar~Cl\\\\M=24+2.35.5\\\\M=24+71\\\\M=95~g/mol[/tex]

When an oceanic plate and a continental plate collide, both will subduct. Therefore, option 3 is correct.

Oceanic plates are plates found beneath the ocean. As previously stated, oceanic plates are denser than continental plates. This is due to the fact that they are made of denser rocks. Basalt is the most common material found in oceanic plates.

When compared to continental crust, oceanic crust formed at spreading ridges is relatively homogeneous in thickness and composition.

Because oceanic crust is naturally denser, when an oceanic plate converges with a continental plate, the oceanic crust will always subduct beneath the continental crust. Convergent boundaries are frequently linked to larger earthquakes and increased volcanic activity.

Thus, option 3 is correct.

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Answer:

See explanation and image attached

Explanation:

The standard cell potential at 298 K is given by;

E°cathode - E°anode

Hence;

E°cell = 0.34 V - (-0.76 V)

E°cell = 0.34 V + 0.76 V

E°cell = 1.1 V

To reduce Zn^2+ to Zn then Zn must be the cathode, hence;

E°cell = (-0.76 V) - 0.34 V

E°cell = -1.1 V

Answer: condensing

Explanation:

Answer:

C

Explanation:

Answer:  The balanced chemical equation is given below.

Explanation:

Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

This also means that total mass on the reactant side must be equal to the total mass on the product side.

The balanced chemical equation follows:The balanced chemical equation follows:

On reactant side:

Number of carbon atoms = 10

Number of hydrogen atoms = 10

Number of iron atoms = 1

On product side:

Number of carbon atoms = 10

Number of hydrogen atoms = 10

Number of iron atoms = 1

So, the balanced chemical equation is given above.

Answer:

#1. Balanced equation: 2C₅H₅ + Fe → Fe(C₅H₅)₂

#2. Type of reaction: Synthesis reaction

Explanation:

Balanced equations are equations that obey the law of conservation of mass.

When an equation is balanced the number of atoms of each element is equal on both side of the equation.

Equations are balanced by putting appropriate coefficients on the reactants and products.

In our case, we are going to put coefficients 2, 1 and 1.

Thus, the balanced equation will be;

2C₅H₅ + Fe → Fe(C₅H₅)₂

This type of a reaction is known as synthesis reaction, in which two or more reactants or compounds combine to form a single compound or product.